Re-rounding of deflected thermoplastic conduit, phase I.

PDFTech ReportFHWA/OH-2017-12SJN 135322Thermoplastic materialsDeflectionPlastic pipeRe-roundingthermoplastic pipemaximum deflectionOhioUnited StatesOhio Research Institute for Transportation and the EnvironmentSargand, Shad M.Russ, AndrewWhite, KevinOhio Research Institute for Transportation and the EnvironmentOhio. Dept. of TransportationUnited States. Federal Highway AdministrationUS Transportation CollectionShad Sargand (ORCID 0000-0002-1633-1045), Andrew Russ (ORCID 0000-0001-7743-2109), and Kevin White (0000-0002-2902-2524) This study investigated the potential benefits of re-rounding of thermoplastic pipe, a process for reducing the deflection of installed pipes by drawing a vibrating mandrel through the pipe. A survey of state DOTs revealed that practice is used rarely, if ever, and the literature on the topic is very sparse, limited to reports on vendor demonstrations. Two contractors were contacted and results of the interviews are included. A plan for a detailed study under controlled conditions and in the field is presented